Security and communication system with location detection

Details Security and communication system with location detection Security and communication system with location detection

1992-01-17

1993-06-29

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340425, 340531, 340536, 455 7, 455 131, G08B 108, H04Q 130

Patent

active

052238164

ABSTRACT:
An improved security and communication system accurately and quickly locates the position of a signaling portable radio frequency transmitter. When a portable transmitter is activated, a first signal, including identification information, is emitted. The first signal is received by any of a number of radio frequency relays, the signal is manipulated and transmitted to a central processing station as a second signal. The central processing station can, by using the second signals received, either from one or a number of relay stations, determine which relay station is closest to the portable transmitter.

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